v3.26.1
Class A C F I I And Class I S [Member] Shareholder Fees - Class A, C, FI, I and Class IS - Western Asset Short Duration Municipal Income Fund
Feb. 28, 2026
USD ($)
Class A  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 2.25% [1],[2]
Maximum Deferred Sales Charge (as a percentage) 0.00% [3],[4]
Maximum Account Fee $ 15 [5]
Class C  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00% [3]
Maximum Account Fee $ 15 [5]
Class I  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00% [3]
Maximum Account Fee $ 0 [5]
Class FI  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00% [3]
Maximum Account Fee $ 0 [5]
Class IS  
Prospectus [Line Items]  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) 0.00%
Maximum Deferred Sales Charge (as a percentage) 0.00% [3]
Maximum Account Fee $ 0 [5]
[1]
Shareholders purchasing Class A shares through certain Service Agents or in certain types of accounts may be eligible for a waiver of the sales charge. For additional information, see “Additional information about each share class — Sales charges” in the Prospectus.
[2]
The sales charge is waived for shareholders purchasing Class A shares through accounts where Franklin Distributors is the broker-dealer of record (“Distributor Accounts”).
[3]
Maximum deferred sales charge (load) may be reduced over time.
[4]
You may buy Class A shares in amounts of $250,000 or more at net asset value (without an initial sales charge), but if you redeem those shares within 18 months of their purchase, you will pay a contingent deferred sales charge of 0.50%.
[5]
If the value of your account is below $1,000, the fund may charge you a fee of $3.75 per account that is determined and assessed quarterly by the fund or your Service Agent (with an annual maximum of $15.00 per account). Please contact your Service Agent or the fund for more information.